公开(公告)号：US12075037B2

公开(公告)日：2024-08-27

申请号：US17810969

申请日：2022-07-06

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Wei-Jung Chien ,  Li Zhang

IPC: H04N19/117 ,  H04N19/136 ,  H04N19/14 ,  H04N19/176 ,  H04N19/463 ,  H04N19/70 ,  H04N19/80 ,  H04N19/82 ,  G06T5/70 ,  H04N19/587

CPC classification number: H04N19/117 ,  H04N19/136 ,  H04N19/14 ,  H04N19/176 ,  H04N19/463 ,  H04N19/70 ,  H04N19/80 ,  H04N19/82 ,  G06T5/70 ,  H04N19/587

Abstract: An example device for filtering a decoded block of video data includes one or more processing units configured to construct filters for classes of blocks of a current picture of video data. To construct filters for each of the classes, the processing units are configured to determine a value of a flag that indicates whether a fixed filter is used to predict a set of filter coefficients of the class, and in response to the fixed filter being used to predict the set of filter coefficients, determine an index value into a set of fixed filters and predict the set of filter coefficients of the class using a fixed filter of the set of fixed filters identified by the index value.

公开(公告)号：US11870576B2

公开(公告)日：2024-01-09

申请号：US17657115

申请日：2022-03-29

Applicant: QUALCOMM Incorporated

Inventor： Hobin Kim ,  Hari Sankar ,  Alessandro Risso ,  Harsha Acharya ,  Alexei Yurievitch Gorokhov ,  Li Zhang

IPC: H04L1/00

CPC classification number: H04L1/0061 ,  H04L1/0068

Abstract: An apparatus for wireless communication is provided. The apparatus may be a receiver device that includes an error correction decoder, such as a low-density parity check (LDPC) decoder. The apparatus may achieve power savings and/or operation cycle savings by disabling the error correction decoder in scenarios where bits of a codeword in a signal transmission are received without errors. The apparatus obtains a first set of bits of a codeword, wherein the codeword includes the first set of bits and a second set of bits, and wherein the second set of bits is punctured. The apparatus recovers the second set of bits based on at least the first set of bits and determines whether to operate an error correction decoder based on a result of an error detection operation performed on the codeword using the first set of bits and the second set of bits.

公开(公告)号：US11563938B2

公开(公告)日：2023-01-24

申请号：US15432839

申请日：2017-02-14

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Wei-Jung Chien ,  Li Zhang

IPC: H04N19/117 ,  H04N19/14 ,  H04N19/70 ,  H04N19/82 ,  H04N19/463 ,  H04N19/136 ,  H04N19/176 ,  H04N19/80

Abstract: An example device for filtering a decoded block of video data includes one or more processors implemented in circuitry and configured to decode a current block of a current picture of the video data, select a filter (such as an adaptive loop filter) to be used to filter pixels of the current block, calculate a gradient of at least one pixel for the current block, select a geometric transform to be performed on one of a filter support region or coefficients of the selected filter, wherein the one or more processors are configured to select the geometric transform that corresponds to an orientation of the gradient of the at least one pixel, perform the geometric transform on either the filter support region or the coefficients of the selected filter, and filter the at least one pixel of the current block using the selected filter after performing the geometric transform.

公开(公告)号：US11463689B2

公开(公告)日：2022-10-04

申请号：US15184118

申请日：2016-06-16

Applicant: QUALCOMM Incorporated

Inventor： Xin Zhao ,  Jianle Chen ,  Li Zhang ,  Marta Karczewicz

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/82 ,  H04N19/136 ,  H04N19/117 ,  H04N19/182 ,  H04N19/59 ,  H04N19/159 ,  H04N19/593 ,  H04N19/139 ,  H04N19/174 ,  H04N19/70

Abstract: A device for decoding video data includes a memory configured to store the video data; and one or more processors configured to decode syntax information that indicates a selected intra prediction mode for the block of video data from among a plurality of intra prediction modes. The one or more processors apply an N-tap intra interpolation filter to neighboring reconstructed samples of the block of video data according to the selected intra prediction mode, wherein N is greater than 2. The one or more processors reconstruct the block of video data based on the filtered neighboring reconstructed samples according to the selected intra prediction mode.

公开(公告)号：US11418294B2

公开(公告)日：2022-08-16

申请号：US17021361

申请日：2020-09-15

Applicant: QUALCOMM Incorporated

Inventor： Cunzhen Liu ,  Alessandro Risso ,  Li Zhang

IPC: H04L1/18 ,  H04L1/00

Abstract: An apparatus (e.g., receive chain) for wireless communications may perform de-interleaving, de-rate matching, and hybrid automatic repeat request (HARQ) combining in a single step. The apparatus may include a data pool configured to store HARQ log likelihood ratio (LLR) data from previous transmissions. The apparatus may include a HARQ onload controller configured to load HARQ LLR data from the HARQ data pool into a HARQ buffer. The apparatus may include an LLR buffer configured to store received demodulated, interleaved, and rate matched LLR data. The apparatus may include a plurality of processing engines configured to, starting at different locations of the LLR buffer: receive new input data from the LLR buffer; combine the HARQ LLR data from the HARQ buffer with the new input data to generate de-interleaved, de-rate matched, and HARQ combined data; and write the de-interleaved, de-rate matched, and HARQ combined data into the HARQ buffer.

公开(公告)号：US11330284B2

公开(公告)日：2022-05-10

申请号：US15080480

申请日：2016-03-24

Applicant: QUALCOMM Incorporated

Inventor： Xiang Li ,  Ying Chen ,  Li Zhang ,  Hongbin Liu ,  Jianle Chen ,  Marta Karczewicz

IPC: H04N19/52 ,  H04N19/513 ,  H04N19/70 ,  H04N19/56 ,  H04N19/46 ,  H04N19/96 ,  H04N19/109 ,  H04N19/57 ,  H04N19/119 ,  H04N19/139 ,  H04N19/176 ,  H04N19/44

Abstract: In an example, a method of processing video data includes splitting a current block of video data into a plurality of sub-blocks for deriving motion information of the current block, where the motion information indicates motion of the current block relative to reference video data. The method also includes deriving, separately for each respective sub-block of the plurality of sub-blocks, motion information comprising performing a motion search for a first set of reference data that corresponds to a second set of reference data outside of each respective sub-block. The method also includes decoding the plurality of sub-blocks based on the derived motion information and without decoding syntax elements representative of the motion information.

公开(公告)号：US20220140976A1

公开(公告)日：2022-05-05

申请号：US17084621

申请日：2020-10-29

Applicant: QUALCOMM Incorporated

Inventor： Ming Ta Lin ,  Afshin Haftbaradaran ,  Shravan Kumar Reddy Garlapati ,  Cunzhen Liu ,  Alessandro Risso ,  Li Zhang

IPC: H04L5/00

Abstract: Methods, systems, and devices for wireless communications are described. A shared channel may include a set of tones carrying multiple types of control information multiplexed together. A wireless device may perform a tone classification method to determine individual subsets of tones from the set of tones for each type of control information to extract each type of control information. The wireless device may determine multiple subsets of tones correspond to multiple types of control information simultaneously based on different extraction parameters. For example, the wireless device may determine a total number of tones in a set of tones, a distance between any given two tones in the set of tones, an offset value, or any combination thereof for the extraction parameters. The wireless device may then use these extraction parameters to determine or extract two or more subsets of tones for two or more corresponding types of control information.

公开(公告)号：US11223852B2

公开(公告)日：2022-01-11

申请号：US15463398

申请日：2017-03-20

Applicant: QUALCOMM Incorporated

Inventor： Xiang Li ,  Jianle Chen ,  Li Zhang ,  Xin Zhao ,  Hsiao-Chiang Chuang ,  Feng Zou ,  Marta Karczewicz

IPC: H04N19/96 ,  H04N19/103 ,  H04N19/46 ,  H04N19/176 ,  H04N19/119 ,  H04N19/30 ,  H04N19/50 ,  H04N19/91 ,  H04N19/51 ,  H04N19/593 ,  H04N19/61 ,  H04N19/583 ,  H04N19/159 ,  H04N19/44 ,  H04N19/124

Abstract: An example device for decoding video data includes a video decoder configured to decode one or more syntax elements at a region-tree level of a region-tree of a tree data structure for a coding tree block (CTB) of video data, the region-tree having one or more region-tree nodes including region-tree leaf and non-leaf nodes, each of the region-tree non-leaf nodes having at least four child region-tree nodes, decode one or more syntax elements at a prediction-tree level for each of the region-tree leaf nodes of one or more prediction trees of the tree data structure for the CTB, the prediction trees each having one or more prediction-tree leaf and non-leaf nodes, each of the prediction-tree non-leaf nodes having at least two child prediction-tree nodes, each of the prediction leaf nodes defining respective coding units (CUs), and decode video data for each of the CUs.

公开(公告)号：US11082708B2

公开(公告)日：2021-08-03

申请号：US16238815

申请日：2019-01-03

Applicant: QUALCOMM Incorporated

Inventor： Li Zhang ,  Wei-Jung Chien ,  Kai Zhang ,  Marta Karczewicz

IPC: H04N19/186 ,  H04N19/117 ,  H04N19/136 ,  H04N19/82 ,  H04N19/182 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/196 ,  H04N19/597 ,  H04N19/577 ,  H04N19/139

Abstract: A method of processing video data includes classifying, by processing circuitry, luma samples of a neighboring luma block of a reference block and luma samples of a neighboring luma block of a current block into a plurality of groups and deriving, by the processing circuitry, one or more local illumination compensation parameters for each group of the plurality of groups to generate a plurality of local illumination compensation parameters for the current block. The method further includes deriving, by the processing circuitry, a plurality of linear models between the neighboring luma block of the reference block and the neighboring luma block of the current block using the plurality of local illumination compensation parameters for the current block and generating, by the processing circuitry, a prediction block using the plurality of linear models.

公开(公告)号：US11039143B2

公开(公告)日：2021-06-15

申请号：US16195590

申请日：2018-11-19

Applicant: QUALCOMM Incorporated

Inventor： Li Zhang ,  Wei-Jung Chien ,  Jianle Chen ,  Marta Karczewicz

IPC: H04N19/13 ,  H04N19/17 ,  H04N19/187 ,  H04N19/96 ,  H04N19/91 ,  H04N19/124 ,  H04N19/159 ,  H04N19/167 ,  H04N19/174 ,  H04N19/176 ,  H04N19/177 ,  H04N19/184 ,  H04N19/55 ,  H04N19/70

Abstract: A method of decoding video data includes determining, by a video decoder implemented in processing circuitry, a context initialization using a plurality of quantization parameters for a portion of a picture of video data decoded using temporal prediction. The method includes storing, by the video decoder, the context initialization with a single probability state for the plurality of quantization parameters. The method includes entropy decoding, by the video decoder, a set of syntax elements in a bitstream using the single probability state.